X-ray CT apparatus
View Patent ↗An X-ray CT apparatus that achieves a higher quality of reconstructed CT images by preventing displacements of relative positions of the X-ray tube and the X-ray detector from occurring, including a front side rotation frame configured to mount at least one X-ray tube and at least one X-ray detector facing the X-ray tube, and a rear side rotation frame configured to mount rotation units other than the X-ray tube and the X-ray detector in order to access both sides of the gantry.
1. An X-ray CT apparatus comprising:
a front-side rotation frame configured to mount at least one X-ray tube for irradiating X-rays through an object and at least one X-ray detector provided at a position facing the X-ray tube in order to detect the irradiated X-rays passing through the object;
a rear-side rotation frame configured to mount rotation units other than the at least one X-ray tube and the at least one X-ray detector, the other rotation units including at least one high voltage generating unit for supplying a high voltage to the at least one X-ray tube;
a main frame configured to support the front-side rotation frame and the rear-side rotation frame;
a plurality of bearing units provided on a circular surface of the main frame at a position between the front-side rotation frame and the rear-side rotation frame and separated so as to form a smaller major diameter than the diameter of the respective side of the rotation frame; and
a frame coupling portion configured to couple the front-side rotation frame and the rear-side rotation frame to the plurality of bearing units.
2. The X-ray CT apparatus according to claim 1 , wherein the front-side rotation frame mounts a plurality of X-ray tubes and at least one X-ray detector facing the plurality of X-ray tubes.
3. The X-ray CT apparatus according to claim 1 , wherein the front-side rotation frame mounts a plurality of X-ray tubes and a plurality of X-ray detectors facing respective of the plurality of X-ray tubes.
4. The X-ray CT apparatus according to claim 1 , wherein the rear-side rotation frame mounts a plurality of high voltage generating units and rotation units other than the X-ray tube and the X-ray detector.
5. The X-ray CT apparatus according to claim 1 , comprising:
a gantry fixed to a floor and supporting the main frame; and
a motor configured to rotate the coupled front-side and rear-side rotation frames.
6. The X-ray CT apparatus according to claim 1 , further including a tilt driving mechanism for tilting the front-side and rear-side rotation frames at a required angle.
7. An X-ray CT apparatus comprising:
a circular rotation frame;
a plurality of bearing units provided so as to surround an outer surface of the circular rotation frame; and
a circular main frame configured to support the circular rotation frame through the plurality of bearing units;
wherein the circular rotation frame includes,
a front-side annular member configured to mount at least one X-ray tube for irradiating X-rays through an object and at least one X-ray detector provided at a position facing the X-ray tube in order to detect the irradiated X-rays passing through the object,
a rear-side annular member configured to mount at least one high voltage generating unit for supplying a high voltage to the at least one X-ray tube and rotational units other than the at least one X-ray tube and the at least one X-ray detector, and
a vertical rib member projected from a surface of a connecting portion of the front-side annular member and the rear-side annular member toward a rotation axis of the rotation frame, the vertical rib member having a center aperture.
8. The X-ray CT apparatus according to claim 7 , wherein the front-side annular member of the circular rotation frame mounts a plurality of X-ray tubes and at least one X-ray detector facing the plurality of X-ray tubes.
9. The X-ray CT apparatus according to claim 7 , wherein front-side annulus member of the circular rotation frame mounts a plurality of X-ray tubes and a plurality of X-ray detectors facing the plurality of X-ray tubes.
10. The X-ray CT apparatus according to claim 7 , wherein the rear-side annular member of the rotation frame mounts a plurality of high voltage generating units and rotation units other than the X-ray tube and the X-ray detector.
11. The X-ray CT apparatus according to claim 7 , further comprising:
a gantry fixed to a floor and supporting the main frame; and
a motor configured to rotate the front-side annular member and the rear-side annular member.
12. The X-ray CT apparatus according to claim 7 , further including a tilt driving mechanism for tilting the rotation frame at a required angle.